I’ve started to use copy.com instead of services like Dropbox, SpiderOak and similar.
Why? Because it’s fast (unlike Dropbox), it’s simple (unlike SpiderOak) and it’s able to run on all major platforms (Windows, OSX, Android, iOS and Linux, both graphical and console. Both are native Linux application).
This article explains how to install the agent on Linux – more specifically how to run the console agent on a Ubuntu-derived distribution.